Roller and key for printing presses



F. OSSING Aug. 15, 1933.

Filed May 15, 1931 Patented Aug. 15; 1933 UNITED STATES PATENT-joFFicEiApplication May 15 1931. Serial No. 537,568 3 Claims. (01. 101-348) ers.

The rollers in common use on what are known as job presses comprise asteel shaft on which is cast a resilient roller, the roller being aglue-.

gelatine composition or specially prepared rub ber. Slidably received-onthe 'ends of the roller shaft are guide rollers which operate on guidesor roller-ways at each side of the press. The movement of the guiderollers over these guide-ways rotates the resilient rollers. Theguiderollers are removable from the shaft by merely sliding themlongitudinally and are prevented from rotating on the shaft when slidinto place by projections which are struck out of the shaft itself, theguide roller having a key-way into which one of the projections fit. y le After being used for some time the rollers become dead and must berecast, the same shaft being used over and over again. It has been foundthat the projections which are struck from the shaft itself are soonworn or "broken off and the shaft rendered useless.

It is the object of my invention to provide a shaft construction whichincludes a removable key of a particular form which may be readilyreplaced when worn so that the shaft of the roller may be usedindefinitely.

A further object is to provide a construction in which the shaft may beof uniform diameter whereby to reduce expense. 1

A still further object is to provide'means on the key which will abutagainst a cooperating means formed in connection with the guide rollersfor positioning said rollers on said shaft.

In the drawing, Fig. 1 is an elevation of an inking roller with a shaftand key constructed in accordance with my invention, one end being shownin section; Fig. 2 is a longitudinal'view through one end of theshaft inpreferred modification; Fig. 3 is asection on line 3-3 of Fig. 2; Fig. 4is a view similar to that of Fig. 2 of a modified form and Fig. 5 is asection on line 55 of Fig. 4.

15 and spaced transversely extending openings 16 and 17. Thekey 13 isgenerally U shaped, be ing provided with extensions 18 adapted to'bereceived in the openings 16 and 17. It will be understood that theprojections 18 have a driven fit whereby to be frictionally held inposition. The key 13 has at the end thereof nearest the end of the shaft12 a level portion 19 and is provided intermediate its ends with aprojection 20 defining a shoulder at the end of the portion 19. Theguide roller 11 is provided with a keyway adapted to receive the portionof the key 13 which extends from the projection 20 toward the end of theshaft 12. The composition covering lion the shaft 12 extendssubstantially to the projection 20 whereby when the roller 11 ispositioned by the key, it will be adjacent the end of the shaft 12 isprovided with a shallow keyway such composition covering. It is to beunderstood that the keyway 15 may be omitted in this modification.

In the modifications of Figs. 4 and 5, the openings 21 are positionednearer the end of the shaft 12 and the key 13 is received entirely orsubstantially entirely within the guide roller 11. To this end, theguide roller is provided with a keyway which is deeper at one end thanthe other provided with a keyway 22 whereby to receive the projection 20up to a certain point and there having its shoulder 23 adapted to abutagainst said projection 20.' The keys are of identical construction inboth modifications and the only differences are, as is clear from thedrawing, those already pointed out. It is to be understood that a keywaycorresponding to that 15 may be provided in the modification of Fig. 4.a

Having thus described my invention, what I claim is:

1. An inking roller construction including, a shaft, a key associatedwith said shaft, said key and said shaft including means whereby saidkey is held against motion with respect to the shaft,

a guide roller on said shaft and provided with a keyway adapted toreceive said key, said key being provided with means adapted to abutsaid guide roller for positioning the same, said key being receivedsubstantially entirely within said guide roller. r

2. An inking roller construction including, a

shaft of substantially uniform diameter, an open- 5 ing extendingtransversely through said shaft, a key having a projection extendinginto said opening and being of a size to be frictionally held therein, aguide roller onsaid shaft and provided with a shouldered keyway adaptedto receive said key, said key being provided with means adapted to abutsaid guide roller for positioning the, same,

said key being received substantially entirely withinsaidguide roller. I

3. An inking roller-construction: including, a

"All"

